Combination-lock.



. R. G. LEWIS. lconanurlon Loox. APPLICATION FILED JULY 25, 1913.214092,84?,-o Patented Apr.14, 1914.

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WHA/5555s www Qa@ W [N VEN T OR COLUMBIA PLANOGRAPH co.. WASHINGTON,Duc.

R. C. LEWIS.

COMBINATION LOCK.

APPLIOATION FILED JULY 25, 1913.

1.092,843. Patented Apr. 14, 1914.

2 SHEETS-'SHEET 2.

COLUMBIA PLANOGRAPH co.,wASmNuToN. D. C.

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ROLLIN C. LEWIS, 0F STANFORD, CONNECTICUT, ASSIGNOR T0 THE YALE & TOWNEMANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

COMBINATION-LOCK.

vlowing to be a full, clear, and exact description of the invention,such as will enable.

others skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in combination locks, one objectof which is to provide improved means for locking the cover plate to thelock casing.

A further object is to provide improved means for locking the part ofthe casing carrying the tumblers to the part of the casing carrying themeans for actuating the tumblers.

vWith these and other objects in view my invention consists in the partsand combination of parts and in details of construction as will be morefully explained and pointed out in the claims.

In the accompanying drawing Figure 1 is a view in elevatio-n showing thelock case carrying the cam, bolt and fence, and the.

cover plate removed and showing the tumblers and cover plate lockingmeans carried by the same. Fig. 2 is a view in longitudinal section withthe cover plate and tum- 'blers in place. Fig. 3 is a view of the coverplate, the tumblers being removed and showing the locking plate and keylock for actuating the same. Fig. 4 is a view of the locking platedetached and Fig. 5 is a view showing the manner of locking the twosections of the tumblers together.

1 represents the lock case carrying the meshing gear wheels 2 and 3, theformer of which is fixed to the dial spindle 4, and the latter to thehollow shaft 5 on which the hub 6 of the fence 7 is mounted, the hubbeing frictionally mounted on the hollow shaft 5 so as to tend to rtatewith said shaft, and will rotate with same until stopped by contact withthe parts which coact with the fence. The hollow shaft 5 is mounted onthe screw stud 5a screwed into the front face of the lock casing. As thetwo gears 2 and 3 are always in mesh, it follows that when the spindle 4is rotated, the shaft 5 will be rotated in the opposite direction. Thespindle 4 which carries the dial 4c, passes through the front plate ofthe lock case, and carries y Specification of Letters Patent.

Application led July 25,` 1913.

Patented Apr. 14, 1914. Serial No. 781,141.

the gear wheel 2, and the cani 9, the gear wheel being located adjacentthe inner surface of the front plate of the lock case, and the camimmediately behind the gear wheel. The fence 7 which is also carried bythe lock case, is operated by the cam to retract and project the bolt inthe usual and well known manner. Each tumbler is disk shaped and iscomposed of an inner disk 8a and an outer disk 8b. These disks areloosely mounted on the sleeve 4a fixed to or integral with the front orinner face of the cover plate 17, and arerotated by the cam 9, and bythe next adjacent tumbler in sequence starting from the cam, the cam andtumblers having the usual engaging means. The inner disk 8a of eachtumbler is serrated on its periphery and each outer disk 8b is providedwith a central opening of a size sucient to receive the inner disk sothat when the two disks or tumbler sections are assembled and lockedtogether, they form in effect a single disk structure with a centralopening to receive the sleeve 4a on which the several tumblers aremounted to rotate. The outer section 8b of each disk is hollowed out andcarries a locking lever 10 fulcrumed at 11, and acted upon at one end bya spring 14, which normally tends to hold the serrated end 12 of thelever out of contact with the serrated periphery of the inner section ofthe tumbler. The serrated end of each lever projects through the innerwall of the outer disk of the tumbler, and is of a length suiiicient toengage a plurality of serrations or teeth on the periphery of the innersection 8, and solidly lock the two parts against independent rotation.Located adjacent the other end of said lever of each disk is the cam 15adapted to force the serrated end of its lever into contact with theserrated surface of the inner section of the disk and lock the twosections against independent movement. By turning the cam in onedirection the lever will be released thus permitting the spring to forcethe serrated end of the lever away from the serra-ted edge cf the innerdisk, and by turning the cam in the opposite direction, the lever willbe forced into Contact with the serrated edge of the inner section ofthe disk thus locking the two sections of the disk together. Each camhas a key opening 15a through the same, and the openings in the severalcams are so located with relation to the periphery of the latter, thatwhen the tumblers are properly set up, the key openings are inalineinent with each other and with an opening in the cover plate, sothat by introducing the proper key and turning saine, the entire seriesof levers carried by the outer sections of the tuinblcrs will beactuated to release the tumbler sections whereby the inner .sections maybe turned to change the combination, which may then be done in the usualand well known manner. With this construction the cam is mounted in thelock case adjacent the front wall thereof, and is secured to the spindleshaft al and the tuinblers are all nested on a support carried by thecover plate and are adapted, when the cover plate is placed on the case,to engage the cam so as to be actuated by the same in the usual and wellknown manner.

The fence 7, is as before explained, mounted on the hollow shaft 5,which is connected with gear wheel 3. rEhe hub 6 of this felice is afriction hub, in that it is provided with means which. make contact withthe hub with suliicient friction to cause the fence to move, and tend tomove in the. direction of rotation of said shaft, so that the rotationof the gear 3, during,` the move rent to set up the tuinblers forunlocking, carries the fence away from the peripheries of the tuinblers,and holds it so removed until the direction of rotation of the gear isreversed for retracting the bolt. The fence T is provided with an arm 7adapted te rest within a slot ltifL in the bolt 16, and with a secondarm 7b adapted to enter the notches 8 in the peripheries of thetumblers, and also the notch 9a in the cam 9.

When the spindle shaft l is turned to the right, as in setting,` up thetumblers for unlocking, the fence will be turned so that its arm 7b willbe carried out of contact with the peripheries of the tumbl-ers and thecam, the slot 16a in the bolt, being of a size and shape to permit suchmovement. Upon reversing the direction of movement of the spindle shaftt, the fence will be turn-ed so as to bring` its arm 7b over intocontact with the peripheries of the cani and tuinblers, and as the notch9a in the cani comes into alinement with the notches in the tumblers,the friction between the shaft and hub of the fence carries the arm 7bof the fence into said notches, and the continued movement of the cani 9acting' on the arm 7b of the fence turns the latter in a direc-tion toretract `the bolt 16. r1`he bolt 1G is slidingly mounted against theinner surface of the frcnt plate of the lock case, and is slotted toreceive the spindle 4 and the fence 7 The tumblers 8 are mounted on thesleeve i-1, which in the present instance is cast integral with thefront or inner face of the cover plate 17, and are held thereon by thesplit collar 4b detachably secured to the end of sleeve il in advance ofthe first tumbler' therein. rlhese tuinblers are further sustained andsupported by the ring` plate 27 which latter is secured by screws to thestuds QS integral with the cover plate. The ring plate 2.7, "as itsnaine implies, is open at its center to permit the engaging means on thecani to engage the nei; adjacent tumbler, as is necessary in theoperation of the loclr.

Mounted on the sleeve et or preferably on an enlargement of the saine,and resting against the front or inner surface of the cover plate 17 isthe cover locking Vplate 28. This plate is preferably providedjwith thetongues 29 projecting from the periphery of the cover lockingI plate andmoving within slots in the guides 30-, which latter operate to hold saidlocking plate in placewhen the tuinblers are removed, the guiding slotsin the guides 30 being of a length suflicient to permit. of a partrotary motion of said loclring' plate. rthis locking plate is alsoprovided, preferably at diametrically opposite points, with theforwardly projecting, lips 31 ha ving outwardly turned endsI 32, whichlatter are adapted, when the locking` plate is turned, to enter lockingslots 33 in the lool; case and absolutely lock the cover plate to thecase, and is further provided with a forwardly proj ect-ing lug Bit,Vwhich latter rests within an elongated'slot in the cam 35 of the pintumbler lock 3G, so that when the cam 35 of the loch 86, which issecured to and carred by the cover plate of the lock, is turned, thecover locking plate Q8 will be turned to either carry the bent ends 32of the lips 31 into or out. of the slots 83, thus locking or releasingthe cover plate as the case may be. This cover locking plate is alsoprovided with a hole 37, which when the plate 28 is turned to a positionto release the cover plate, alines with the lrey hole in the latter sothat in order to introduce the lrey used for actuating the levers whichlock the disk sections of the tumblers together, it is rst necessary,with the construction as herein illustrated, to rotate the cover lockingplate by its key into its unlocking position. But it is apparent. thatthe key hole in the cover locking plate could be made to aline with thehey hole in the cover plate when the locking plate is in its lockinglposition.

The cover locking` plate 2S is of slightly greater diameter' than thetumbler-s 8, and its periphery is cut away adjacent the fence so as notto interfere with the free passage of the arm 7b of the latter into theslots in the tuinblers, and this cut away portion is so shaped at oneend as to form a linger 38, which, when the cover locking plate isturned to its unlocking position, engages the rear end of arin 7b of thefence and holds the latter away from and out of contact with theperipheries of the tumblers. The turnblers are all nested in the coverplate of the lock, so that when the cover plate is applied to the lockcase the tumblers bear proper operative relation to the cam and tence.

To change the combination, the door carrying the lock is opened, and thekey inserted in the lock carried by the cover plate of the lock andturned in a direction to release the cover. This brings the key hole inthe cover locking plate into alinement with the key hole in the coverplate, and after the key openings in the cams of the several tumblershave been brought into alinement with each other and with the key holein the cover plate, and cover locking plate, the key can be insertedthrough the cover plate and turned to actuate the cams in a direction todisconnect the levers l() from the inner sections of the tumblersections, thus leaving said inner sections tree to be turned by the dialspindle to set up the tumblers on any desired combina-tion.

In order to change the combination, the cam and connected inner sectionsof the tumblers must be free to turn, while the outer sections of thetumblers are held against movement. This is made possible by having thecam at the front and the tumb-lers in rear of the cam, the' cam forminga stop against which the end of the key may abut.

While I have referred to the inner disks 8a of the tumbers as havingserrated peripheries, this is not essential, as the levers l0 may havebearing suiiiciently extensive on the inner disks to hold them byfriction alone, but I prefer to serrate the disks and have so shown themin the drawings.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described .without departing'from the spirit and scope of my invention. I-Ience I would have itunderstood that I do not wish to coniine myself to the exactconstruction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

l. In a combination lock, the combination of a lock casing, a cam, meanscarried by the casing for rotating the cam, a cover plate, a tumblercarried by the cover plate and removable with the same, means connectingthe cam and tumbler whereby the latter is rotated by the former, and adevice pivoted to the cover plate and adapted to engage the lock casingat a. plurality of points for locking the cover plate to the casing.

2. In a lock, the combination of a lock casing, a bolt and boltactuating means within the casing, a cover plate, a locking devicemovably mounted on said cover plate and adapted to engage the casing forlocking the cover plate to the casing, and a lock independent oi" themain lock for shitting the locking device to its locking and unlockingpositions and also for locking said locking device against movement.

In a combination lock, the combina-tion of a lock casing, a bolt andbolt actuating means within the casing, a cover plate for the casing, acover locking plate mounted to turn on said cover plate, and a key lockand connections whereby said locking plate may be turned to release andlock the cover plate to the casingV and be locked against turningmovement.

il. In a combination lock, the combination of a. lock case, a camjournaled therein, a sliding bolt, a fence intermediate the cam and boltfor actuating the latter, a cover plate for the lock, a series ottumblers nested on a bearing rigid with t-he cover plate, and a devicealso carried by the cover plate and actuated by a key lock on the latterfor holding the tence out ot contact with the cam and tumblers while thecombination of the lock is being changed.

` 5. In a combination lock, the combination of a loc-k case, a cam andtumblers therein, a sliding bolt, a tence intermediate the cam and bolttor actuating the latter, a cover plate tor the lock and a devicecarried by the cover plate and actuated by a key lock on the latter forlocking the cover plate to the casing and for holding the fence out ofcontact with the cam .while the combination of the lock is beingchanged.

G. In al combination lock, the combination of a lock case, a camtherein, a sliding bolt, a tence intermediate the cam and bolt foractuating the latter, a cover plate for the lock, a series oi tumblersnested on a bearing rigid with the cover plate and a device also carriedby the cover plate and actuated by a key lock on the latter for lockingthe cover plate to the casing and also for holding the tence out otcont-act with the cam and tumblers while the combination of the lock isbeing changed.

In testimony whereof, I have signed this specification in the presenceof two subscribw ing witnesses.

R. C. LEIVIS. Witnesses VARREN H. TAYLOR, IVALTON B. THOMAS.

Copies of this patent may be obtained for ve Vcents each, by addressingthe Commissioner of Patents, Washington, D. C.

